ccid: Enable compilation under Emscripten (#284)
ccid: Enable compilation under Emscripten (#284)

This commit enables compiling the CCID Free Software Driver in the
Emscripten/WebAssembly mode.

The code in this driver is a pure C code that doesn't use itself
low-level OS interfaces (like direct USB access), which is why it can
be compiled using Emscripten without code adaptations.

This commit contributes to the Emscripten/WebAssembly migration
effort tracked by #233.
googlechromelabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector